/*
Copyright 2021 Google LLC

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

using System.Threading;
using System.Threading.Tasks;

namespace Google.Apis.Auth.OAuth2
{
    /// <summary>
    /// Represents a data blob signer. 
    /// </summary>
    public interface IBlobSigner
    {
        /// <summary>
        /// Returns the base64 encoded signature of the given blob.
        /// </summary>
        /// <param name="blob">The blob to sign.</param>
        /// <param name="cancellationToken">The cancellation token.</param>
        /// <returns>The base64 encoded signature.</returns>
        Task<string> SignBlobAsync(byte[] blob, CancellationToken cancellationToken = default);
    }
}
